Assurant, Inc.
MX ˙ BMV ˙ US04621X1081
SecurityMX:AIZ / Assurant, Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership408,589 shares
Latest Disclosed Value $ 88,994,770
First Manhattan Co reports 1.46% decrease in ownership of AIZ / Assurant, Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 408,589 shares of Assurant, Inc. (MX:AIZ) valued at $88,994,770 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 414,642 shares of Assurant, Inc.. This represents a change in shares of -1.46% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ASSURANT COM 04621X108 408,589 -6,053 -1.46 88,995 -10.89 0.2468
2026-02-17 2025-12-31 13F ASSURANT COM 04621X108 414,642 14,192 3.54 99,867 15.14 0.2622
2025-11-14 2025-09-30 13F ASSURANT COM 04621X108 400,450 14,869 3.86 86,737 13.91 0.2291
2025-08-14 2025-06-30 13F ASSURANT COM 04621X108 385,581 4,797 1.26 76,148 -4.66 0.2150
2025-05-15 2025-03-31 13F ASSURANT COM 04621X108 380,784 -13,260 -3.37 79,869 -4.94 0.2330
2025-02-14 2024-12-31 13F ASSURANT COM 04621X108 394,044 14,610 3.85 84,018 11.35 0.2464
2024-11-14 2024-09-30 13F ASSURANT COM 04621X108 379,434 21,270 5.94 75,454 26.72 0.2237
2024-08-15 2024-06-30 13F/A-1 ASSURANT COM 04621X108 358,164 -19,238 -5.10 59,545 -16.18 0.1909
2024-08-14 2024-06-30 13F ASSURANT COM 04621X108 358,164 -19,238 59,545 0.1910
2024-05-15 2024-03-31 13F ASSURANT COM 04621X108 377,402 22,664 6.39 71,042 18.86 0.2302
2024-02-13 2023-12-31 13F ASSURANT COM 04621X108 354,738 71,707 25.34 59,770 47.08 0.2074
2023-11-14 2023-09-30 13F ASSURANT COM 04621X108 283,031 258,441 1,051.00 40,638 1,214.69 0.1500
2023-08-14 2023-06-30 13F ASSURANT COM 04621X108 24,590 -210 -0.85 3,091 3.83 0.0113
2023-05-15 2023-03-31 13F ASSURANT COM 04621X108 24,800 -1,205 -4.63 2,978 -8.46 0.0114
2023-02-14 2022-12-31 13F ASSURANT COM 04621X108 26,005 0 0.00 3,252 -13.90 0.0119
2022-11-14 2022-09-30 13F ASSURANT COM 04621X108 26,005 -300 -1.14 3,777 -16.92 0.0160
2022-08-15 2022-06-30 13F ASSURANT COM 04621X108 26,305 -475 -1.77 4,546 -6.63 0.0183
2022-05-16 2022-03-31 13F ASSURANT COM 04621X108 26,780 -330 -1.22 4,869 15.24 0.0159
2022-02-14 2021-12-31 13F ASSURANT COM 04621X108 27,110 -4,300 -13.69 4,225 -14.72 0.0139
2021-11-15 2021-09-30 13F ASSURANT COM 04621X108 31,410 -315 -0.99 4,954 0.00 0.0183
2021-08-16 2021-06-30 13F ASSURANT COM 04621X108 31,725 -10 -0.03 4,954 10.11 0.0181
2021-05-14 2021-03-31 13F ASSURANT COM 04621X108 31,735 -280 -0.87 4,499 3.16 0.0194
2021-02-16 2020-12-31 13F ASSURANT COM 04621X108 32,015 0 0.00 4,361 12.31 0.0209
2020-11-12 2020-09-30 13F ASSURANT COMMON 04621X108 32,015 -160 -0.50 3,883 16.85 0.0200
2020-08-14 2020-06-30 13F ASSURANT COMMON 04621X108 32,175 -10,145 -23.97 3,323 -24.56 0.0192
2020-05-06 2020-03-31 13F ASSURANT COMMON 04621X108 42,320 -50 -0.12 4,405 -20.67 0.0285
2020-02-13 2019-12-31 13F ASSURANT COMMON 04621X108 42,370 -250 -0.59 5,553 3.56 0.0279
2019-11-13 2019-09-30 13F ASSURANT COMMON 04621X108 42,620 -1,490 -3.38 5,362 14.28 0.0295
2019-08-16 2019-06-30 13F ASSURANT COMMON 04621X108 44,110 -235 -0.53 4,692 11.50 0.0260
2019-04-12 2019-03-31 13F ASSURANT COMMON 04621X108 44,345 -225 -0.50 4,208 5.57 0.0243
2019-01-30 2018-12-31 13F ASSURANT COMMON 04621X108 44,570 -775 -1.71 3,986 -18.55 0.0248
2018-10-15 2018-09-30 13F ASSURANT COMMON 04621X108 45,345 -5,865 -11.45 4,894 -7.64 0.0261
2018-08-01 2018-06-30 13F ASSURANT COMMON 04621X108 51,210 -10,950 -17.62 5,299 -6.74 0.0306
2018-04-20 2018-03-31 13F ASSURANT COMMON 04621X108 62,160 -15 -0.02 5,682 -9.36 0.0323
2018-01-22 2017-12-31 13F ASSURANT COMMON 04621X108 62,175 0 0.00 6,269 5.57 0.0344
2017-10-25 2017-09-30 13F ASSURANT COMMON 04621X108 62,175 -840 -1.33 5,938 -9.12 0.0340
2017-08-10 2017-06-30 13F/A-2 ASSURANT COMMON 04621X108 63,015 0 0.00 6,534 8.39 0.0381
2017-08-01 2017-06-30 13F/A-1 ASSURANT COMMON 04621X108 63,015 0 6,534 0.0381
2017-07-28 2017-06-30 13F ASSURANT COMMON 04621X108 63,015 0 6,534
2017-04-25 2017-03-31 13F/A-1 ASSURANT COMMON 04621X108 63,015 -115 -0.18 6,028 2.83 0.0358
2017-04-24 2017-03-31 13F ASSURANT COMMON 04621X108 63,130 5,823
2017-01-25 2016-12-31 13F ASSURANT COMMON 04621X108 63,130 0 0.00 5,862 0.67 0.0356
2016-10-20 2016-09-30 13F ASSURANT COMMON 04621X108 63,130 850 1.36 5,823 8.33 0.0355
2016-07-14 2016-06-30 13F ASSURANT COMMON 04621X108 62,280 -560 -0.89 5,375 10.87 0.0330
2016-04-22 2016-03-31 13F ASSURANT COMMON 04621X108 62,840 -2,510 -3.84 4,848 -7.89 0.0298
2016-01-20 2015-12-31 13F ASSURANT COMMON 04621X108 65,350 600 0.93 5,263 2.89 0.0323
2015-10-26 2015-09-30 13F ASSURANT COMMON 04621X108 64,750 0 0.00 5,115 17.91 0.0329
2015-07-17 2015-06-30 13F ASSURANT COMMON 04621X108 64,750 -2,715 -4.02 4,338 4.71 0.0256
2015-04-30 2015-03-31 13F ASSURANT COMMON 04621X108 67,465 -750 -1.10 4,143 -11.23 0.0239
2015-01-20 2014-12-31 13F ASSURANT COMMON 04621X108 68,215 -700 -1.02 4,667 5.33 0.0264
2014-10-23 2014-09-30 13F ASSURANT COMMON 04621X108 68,915 0 0.00 4,431 -1.90 0.0258
2014-08-14 2014-06-30 13F/A-1 ASSURANT COMMON 04621X108 68,915 -9,085 -11.65 4,517 -10.84 0.0286
2014-05-16 2014-03-31 13F ASSURANT COMMON 04621X108 78,000 -14,650 -15.81 5,066 -17.61 0.0334
2014-02-04 2013-12-31 13F ASSURANT COMMON 04621X108 92,650 -80,650 -46.54 6,149 -34.41 0.0406
2013-10-29 2013-09-30 13F ASSURANT COMMON 04621X108 173,300 0 0.00 9,375 1.43 0.0655
2013-08-13 2013-06-30 13F ASSURANT COMMON 04621X108 173,300 173,300 9,243 0.0636
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.